/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.googlecode.jasperlib.internal.jasper.compiler;

import java.text.MessageFormat;
import java.util.Locale;
import java.util.MissingResourceException;
import java.util.ResourceBundle;

/**
 * Class responsible for converting error codes to corresponding localized error
 * messages.
 * 
 * @author Jan Luehe
 */
public class Localizer {

    private static ResourceBundle bundle = null;

    static {
        try {
            bundle = ResourceBundle.getBundle("com.googlecode.jasperlib.internal.jasper.resources.LocalStrings");
        } catch (Throwable t) {
            t.printStackTrace();
        }
        
        if (bundle == null) {
            //try english
            try {
                bundle = ResourceBundle.getBundle("com.googlecode.jasperlib.internal.jasper.resources.LocalStrings", Locale.ENGLISH);
            } catch (Throwable t) {
                t.printStackTrace();
            }
        }
    }

    /*
     * Returns the localized error message corresponding to the given error
     * code.
     * 
     * If the given error code is not defined in the resource bundle for
     * localized error messages, it is used as the error message.
     * 
     * @param errCode Error code to localize
     * 
     * @return Localized error message
     */
    public static String getMessage(String errCode) {
        String errMsg = errCode;
        try {
            errMsg = bundle.getString(errCode);
        } catch (MissingResourceException e) {
        }
        return errMsg;
    }

    /*
     * Returns the localized error message corresponding to the given error
     * code.
     * 
     * If the given error code is not defined in the resource bundle for
     * localized error messages, it is used as the error message.
     * 
     * @param errCode Error code to localize
     * 
     * @param arg Argument for parametric replacement
     * 
     * @return Localized error message
     */
    public static String getMessage(String errCode, String arg) {
        return getMessage(errCode, new Object[] { arg });
    }

    /*
     * Returns the localized error message corresponding to the given error
     * code.
     * 
     * If the given error code is not defined in the resource bundle for
     * localized error messages, it is used as the error message.
     * 
     * @param errCode Error code to localize
     * 
     * @param arg1 First argument for parametric replacement
     * 
     * @param arg2 Second argument for parametric replacement
     * 
     * @return Localized error message
     */
    public static String getMessage(String errCode, String arg1, String arg2) {
        return getMessage(errCode, new Object[] { arg1, arg2 });
    }

    /*
     * Returns the localized error message corresponding to the given error
     * code.
     * 
     * If the given error code is not defined in the resource bundle for
     * localized error messages, it is used as the error message.
     * 
     * @param errCode Error code to localize
     * 
     * @param arg1 First argument for parametric replacement
     * 
     * @param arg2 Second argument for parametric replacement
     * 
     * @param arg3 Third argument for parametric replacement
     * 
     * @return Localized error message
     */
    public static String getMessage(String errCode, String arg1, String arg2, String arg3) {
        return getMessage(errCode, new Object[] { arg1, arg2, arg3 });
    }

    /*
     * Returns the localized error message corresponding to the given error
     * code.
     * 
     * If the given error code is not defined in the resource bundle for
     * localized error messages, it is used as the error message.
     * 
     * @param errCode Error code to localize
     * 
     * @param arg1 First argument for parametric replacement
     * 
     * @param arg2 Second argument for parametric replacement
     * 
     * @param arg3 Third argument for parametric replacement
     * 
     * @param arg4 Fourth argument for parametric replacement
     * 
     * @return Localized error message
     */
    public static String getMessage(String errCode, String arg1, String arg2, String arg3, String arg4) {
        return getMessage(errCode, new Object[] { arg1, arg2, arg3, arg4 });
    }

    /*
     * Returns the localized error message corresponding to the given error
     * code.
     * 
     * If the given error code is not defined in the resource bundle for
     * localized error messages, it is used as the error message.
     * 
     * @param errCode Error code to localize
     * 
     * @param args Arguments for parametric replacement
     * 
     * @return Localized error message
     */
    public static String getMessage(String errCode, Object[] args) {
        String errMsg = errCode;
        try {
            errMsg = bundle.getString(errCode);
            if (args != null) {
                MessageFormat formatter = new MessageFormat(errMsg);
                errMsg = formatter.format(args);
            }
        } catch (MissingResourceException e) {
        }

        return errMsg;
    }
}
